Machine for grooving and punching needle-blanks



(No Model.)

. I. T. SMITH.

MACHINE FOR GROOVING AND PUNUHING NEEDLE BLANKS.

Patented J an. 16

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(No Modem Y If. T. SMITH. MACHINE EoE GEoovING AND EUNGEENG NEEDLE BLANES.

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No. 512,912. y Patented Jan. 16, 1894.

(NdModel.) j n 8 lSheets--Sheet 4. v

' I. T. SMITH. MACHINE FOR GROOVING AND PUNGHING NEEDLE BLANK-S.`

No. 512,912. Patented Jah. 16, 1894..A

8 Sheets-Sheet 5 (Nd Model.) Y

1. T. SMITH. MACHINE FOR GROOVING AND PUNGHING NEEDLB1-BLANKS. l

'Patnted .13.11. 16, 1894..

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y I. T. SMITH. MACHINE FOR GROOVING AND PUNGHING NEEDLE BLANKS.

No. 512,912. Patented Jan. 16, 1894.

(No Model.) v v 8 Sheets-Sheet 7.

. I. T. SMITH. ,E MAGE-INE EOE GEooNINGfv AND EUNGEINE NEEDLE BLANES.

No. 512,291.2. y Patented Jan. 16,1894.

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I. T. SMITH. MAUHINE EUR GROOVING AND PUNGHING NEEDLE BLANKS No. 512,912. PatentedJan. 16, 1894.

"rrnn STATES PATENT IRA T. SMITH, OF MOUNT CAMEL, CONN ECTICUT.v

SPECIFICATION forming part of Letters Patent No. 512,912, dated January 16, 1894.

Application filed July 15,1893.

To all whom t may concern/.-

Be it known that I, IRA T. SMITH, of Mount Carmel, in the county of New Haven and State of Connecticut, have invented a new Improvement in Machines for Grooving and Punching Needle-Blanks and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1,a plan view of a machine Aembodying my invention; Fig. 2, a view in side elevation with the punching mechanism removed; Fig. 3, a view in side elevation of the punching mechanism, together with a few other parts of the machine; Fig. 4, a view partly in side elevation and partly in vertical section on the line a-b of Fig. 1; Fig. 5, a view in front elevation of the blank-feeding and punchingr mechanism with the machinebed and the operating-bar of the blank-carrier in transverse section; Fig. 6, an enlarged view in vertical longitudinal section of the blank feeding mechanism, including the hopper; Fig. 6, a view in transverse section through the hopper and weight; Fig. 6b, a detached reverse plan view of the weight; Fig. '7, an enlarged view in vertical transverse section on the line c-CZ of Fig. 1, and showing the groove-cutting mechanism; Fig. 8, an enlarged broken plan view showing the blankcarrying mechanism; Fig. 9, an enlarged view in vertical longitudinal section on the line e-f of Fig. 1, and showing the devices employed for operating the groove-cutters; Fig. 10, an enlarged view in longitudinal section of the chuck of the blank-carrying mechanism; Fig. 11, an enlarged broken plan view of the extension of the machine-bed, showing the devices employed to oscillate the turret which carries the chuck; Fig. 12, an enlarged detached reverse plan view of the turret-slide; Fig. 13, an enlarged view in cross section on the line g-h of Fig. 1; Fig. 14, a view of the needle-blank; Fig. 15, a View of one sideof the same after it has been grooved and punched; Fig. 16, a similar' view of the other side of the needle.

My invention relates to a machine for grooving and punching needle-blanks, the object serial No. 480,000. un man.)

being to provide a compact and effective improved automatic machine adapted to perform both of those operations accurately and rapidly, whereas heretofore needle blanks have been usually grooved in one machine and then manually fed to and punched in another machine, because automatic machines heretofore devised have not proved practical or effective in use.

With these endsin view, my invention consists in the combination with grooving and punching mechanism, of a chuck or needlecarrier constructed and arranged to present a blank to the former, and then automatically shift it to the latter.

My invention further consists in a machine having certain details of construction and combinations of parts as will be hereinafter described, and pointed out in the claims.

As herein shown, the several mechanisms of the machine are mounted upon a base-plate or bed A, lconstructed near its opposite ends with upright standards B and C, having bearings in which the main driving-shaft D is journaled in a horizontal position.

At the forward end of the base-plate A, is an upright E, Fig. 2, with separated branches F (Figs. 5 and 6) above which on table F thereof is arranged an elongated needle-feed box or hopper G, having a longitudinal slot G6 formed in one edge of its bottom G7. Below the said hopper G, and supported by the foot-piece G8 which is secured to table F (between which foot-piece and the hopper is located a chute to be described) is a bracket g adjustable on said foot-piece, in which is j our naled a short horizontal shaft G.

Mounted upon shaft G is a belt-pulley G2, preferably of raw-hide,over which and a pulley G3 supported at the outer end of the hopper, is trained an endless blank feeder or belt G4, the said belt running in the slot G6 in the bottom of the hopper, with its carrying sur'- face extending very slightly above thesame. The heads of the said needle-blanks rest upon said belt, so that the needles may be'fed forward by it. The shaft G is provided at its end, outside the hopperI G, with a ratchetwheel G5; and pivoted at one en/d on said shaft G', and at its other end to a vertical rod l-l, is a connecting-piece or link H', carrying a pivotal pawl or dog H2, for engagpmentwith IOO the teeth of the ratchet-wheel G5. To the lower end of the rod H, is pivoted one end of a rocking-lever H3,fulcrumed between its ends in a bracket H4, secured to the base-plate A, as shown in Fig. 9. The free end ot' the lever H5, extends under the main driving-shaft D, in operative relation to a wheel or disk H5, rigidlysecured to the main driving-shaft, and carrying a laterally projecting pin H5, which, during each rotation of said wheel or disk, strikes and depresses the free end of the lever H3, raising its other end,and through the medium of the vert-ical rod Il, connecting-piece l-I' and pawl H2, rotating the ratchet-wh eel G5, the distance of one tooth. In this manner the endless feeder or belt G4 is made to travel intermittently to feed the needles at given intervals.

The hopper G is fitted with a removable weight H7, constituting a gravitating follower, that presses the needles down against the endless feeder or belt G4, and which is corrugated or serrated on its bottom edge, as shown in Figs. 6 and 65, the serrations or corrugations conforming in shape to and adapted to receive the heads of the needle-blanks. Said follower IrlT is retained in position by a tongue HfL formed thereon at one end, and fitting into a groove H" in the block l-lc fixed in the front end of the hopper, and its length is slightly less than that of the hopper, so that it is capable of a slight longitudinal movement therein, equal to the distance between the several teeth of the ratchet-wheel G5, so that it will operate in unison with said ratchet-wheel, and accurately guide the needles being fed, to deliver them from the hopper in proper position. This longitudinal movement is imparted to the follower H7, by means of a pin H9, carried by the connecting link H ,and entering the space between two arms H8, secured to the side of the follower. When the free end of the rocking-lever H3 is depressed, as before described, the pin H9 presses against one of these arms H5, moving the follower longitudinally for the purpose described, and when the free end of the rocking-lever H3 rises, after the passage of the pin H5, the follower is moved back by the pin H9 striking the other arm H5. These arms are adjustable, as shown in the drawings, to control the extent of longitudinal movement of the follower or weight H7.

At the delivery end of the feed-hopper G, to one side of the endless feeder or belt, is arranged a guide-plate G, which lies close to the bottom of the hopper, and prevents more than one layer of needle-blanks to pass thereunder, and be delivered from the hopper at a time.

Upon the main driving-shaft D, -near one end, is mounted a wheel I, having upon its face a cam-projection I', with which engages the cam-shaped end I2 of a lever I3, pivoted to the base-plate A, being connected to the end of a reciprocating rod or plunger I4, passing through a tubular guide l as shown in Figs.

1 and 6, the other end of which plays against the lower end of a rocking-arm 15, pivoted in the upright E, and lying in the recess formed by the branches F. This arm l5, at its upper end, extends into a recess in the table F ,and lies closely against the delivery end of the chute I7 projecting downwardly from the front end of the hopper, and at its front edge is formed with a needle-blank receiving groove l5, which normally, and as shown in dotted lines in Fig. 6, registers with the delivery end of the chute 17, into which chute the needle blanks are carried by the belt G4, and wherein they fall by gravity to its delivery end.

A movable holder or plate a: is located at the outer side of the needle-blank receiving groove l5, so as to prevent the blank from falling out, and said plate has at each end ears an which are pivotally connected with each side of said arm l5. At the inner end of the groove I6 is a stop 'L' which constitutes an abutment for the points of the blanks. To the front wall of the chute is secured a swinging gate or stop 15 having ears i2 at each end, which are pivoted to the sides of the chute, and the nose of which lies at the end thereof, and is engaged by the lowermost needleblank, being swung away therefrom to permit a needle-blank to drop into the groove 15, by frietional contact with the rear upper surface of the rocking-arm l5. In this manner the needle-blanks are delivered one by one into the receiving groove I5. Vhen during the rotation ot' the wheel I, the cam I engages the cam-shaped end of the lever I3, the reciproeating plunger is forced against the rockingarm l5, thereby throwing the upper end of said arm with a needle-blank lying therein to the forward position shown in full lines in Figs. 5 and 6 of the drawings, and swinging the stop-gate I8 away from the chute I5. The needle-blank is now in position to be taken by the chuck which carries it to the groovecutters. After the blank is taken from the groove I5, the rocking arm is moved back to its rearward position to receive another blank in thegroove, by a spring I9, bearing thereagainst, and against the upright E.

I will now proceed to describe the cutting mechanism for grooving the needles and the means for operating the same. Upon the main drivin g-shaft D, is mounted a gear-wheel J, meshing with a similar wheel J', mounted upon a shaft J2, journaled in bearings formed in the standard C and a vertical support J3 and by means of which said shaft is rotated. Upon said shaft is mounted a hub J5, having at its opposite ends peripheral cams J5 and J 5. ln standards J 7, J8 secured to the baseplate A, are fulcrumed upper and lower rocking-frames J9 and .T10 respectively, the rear ends of which rocking-frames extend to, and above and below, the hub J and in operative relation, respectively, with the cams J5 and J5. In the front ends of the rocking-frames aro journaled cutter-carrying shafts K K', upon the inner ends of which are located vertically IOO IIO

plained, and the other is fixed to clamp-bed or` block K9 carried by a slide K5, the latter being provided with a dove-tail recess K5, which receives a corresponding dove-tail projection K8,

extending from the vertical support J 3. From the front of the base-plate projects an extension Z, on which is arranged a block or stock L, formed with a dove-tail guide L', provided with a longitudinal way or slot L2, which is intersected by a lateral opening L2, in which is fitted a small plate L4, capable of sliding4 transversely or laterally therein. Secured near the inner edge of this plate on the upper face thereof, is a cam-shaped projection L5, having an oblique face Z on one side, and a face Z2 of greater Obliquity on the other, said faces meeting in a point or acute angle Z5. Sliding back and forth upon the dove-tail guide L', is a support L5, having a corresponding dove-tail recess to (it the guide L. A circular head or turret L7 is swiveled in this support, as shown in the drawings,which head is provided with a downwardly projecting pin L5, which works in an arc-shaped elongated slot L9, formed in the support L5,

4 concentrically with the swivel Z4, and limits the turning movement of the swiveled head. The pin L5, alsoenters the longitudinal slot L2 in the guide L', and in connection with the face of the cam L5, performs the function of turning the head L7, to present the needleblank to the eye-punching mechanism, as hereinafter described. The sliding plate L4, is pushed outward to permit the passage of the sliding support L5 in its forward movement, by means of the pin L2, striking against the face Z' of cam L5, and it is returned to its normal position by a spiral spring L10 located internally thereof, and engaged by a projection L41 from block L, as will be readily understood. Bearings M, are formed upon the upper surface of the support L5, and confined in said bearings by caps M', is a hollowed out, cylindrical tube M2, (Fig. 10,) having a flaring mouth M5. Within this tube is-alongitudinally movable rod M4, the rear end of which extends without the tube, and the front end of which is slitted lengthwise to form needle-gripping jaws M5. The rear end of the rod M4 has ahead m, which fits in an enlarged chamber m in the tube M2 against which head a confined spring m2 bears and retracts the rod. When the rear end of the rod M4, stri kes against a stationary abutment, hereinafter referred to, thev jaws M5 are forced forward out of the tube, and open away from each other to receive the head of the needleblank from the groove l5, and are then caused to recede into the tube, with the needle firmly grasped by' them, by means of the coil-spring m2. The head m of the rod M4, strikes against a suitable buffer or abutment M5, secured on a bracket m5, in front of the dove-tail guide L', at the extreme limit of backward movement of the support L5, whereby the jaws M5, are forced out of the tube or cylinder, and opened to receive the needle-blank. The supporting block L5, is connected by a suitable i' detachable coupling device M7, yto a strong metallic strip M5, which is adapted to reciprocate in bearings formed therefor in brackets M5, attached to the base-piece A. The bar or strip M5, and the attached support L5, andthe parts carried thereby, are moved forward in any suitable manner, as by a spring (not shown) the pin L8 depending from the swivel head L7, entering between the inclined edge Z of the cam L5, and the wall of the longitudinal recess L2, thus forcing the cam out of the way of progress, and immediately after the pin has cleared the cam, said cam is returned to its place by the spring L10 acting upon the sliding-plate L4. Fulcrumed to the clamp-bed or block K9,is a lever N, the inner end of which is pivoted to the movable clamp K5, and the other end is provided with a lip n, which works upon the eccentric face of an adjustable cam-plate N', carried by a support N2, swiveled to the slide K5, and having a pin N2, (Fig. 2) extending laterally therefrom. Said pin is struck by a projection N4, from a plate N5, secured to and rotating with the main driving-shaft D, and so timed in its rotation that it strikes the pin N3, and turns the swiveled support N2, so that the cam face on the plate N', forces the end of the lever with which it engages in a direction to clamp the stem of the needle-blank between the clamps K4 K5 at the moment the chuck M2 presents the needle. From this point the chuck M2 and ythe clamps K4 K5 travel forw'ard in unison, the needle-stem passing between the stationary rotary cutters K2 K5, which form the grooves therein. The rearward movement of the clamps is imparted by a strong spring N5, one end of which is secured to a post N5 secured to the base-plate, and the other end of which is secured to the slide K5.

The cutters K4 K5 are driven in the following manner: Journaled in bearings secured to the standard C, and the upright J2, is a shaft O, carrying a grooved pulley O', and on the cutter-shaft K, is mounted a double- ICO IIC

IIS

grooved pulley O2, over which pulleys is trained a driving-belt O2. The shaft O, carries a pinion o, which meshes with a gearwheel o', mounted upon the end of a wormshaft O4, journaled in bearings secured to the standard C, with which worm-shaft a wormvwheel O5 mounted upon the main drivingshaft D, meshes, and transmits motion to the cutter-shaft K. The cutter-shafts K and K' are provided with intermeshing gears O5 and O7, whereby motion is imparted to the lower shaft K' from shaft K. The cams J5 and J5 upon the hub J4, are of different lengths, that cam with which the upper rocking-frame J9 engages being of greater length than the cam which engages -the rocking-frame J10, so that the cutter which acts upon the lower side of the needle makes a short groove, and that which operates upon the upper side of the needle makes along groove, extending a slight distance upon each side of the point where the eye is to be punched, the cutters beingin operative contact with the needle only when the rear en ds of the rocking frames are pushed away from the said hub by the cams J5 J0 with which they are kept in engagement by a spring J11 interposed between the forward ends of the frames. As soon as the cutters K2K3 have finished their work, andthe grooves have been formed, the clamps K1 K5 release the needle through the medium of an arm OS, secured to the upright J2, and which projects into the path of a pin O0, upon the swivel su pport N2, and turns said support back to its rearward position. The lip upon the end of the lever N, will by this movement, be caused to pass back over the cam face of the plate N', and be forced into a notch n therein, by the action of a leaf spring O10, secured to the upright J3, thus moving the movable clamp K5, away from the stationary clamp K4. The clamps now begin their forward movement, being impelled by a cam P, secured to the end of the shaft J2, and whose face works against a pin P, that projects laterally from an arm P2, secured to the slide K0, whereby they are brought into proper position to receive the needle next to be operated upon. Simultaneously with the beginning of the forward movement of the clamps, the cylinder or tube M2, with its gripping jaws M5, which constitutes the chuck, begins its backward movement, being pushed by a cam Q, secured to the driving-shaft D, which cam acts upon a pin Q', projecting from the reciprocating strip M0. When the pin L2 in the swivel-head L1, strikes against the inclined face Z2 of the cam L5, the pin Q on the strip M8 passes into a recess Q in the cam Q, and remains inactive. At this point a straight acting face Q2 on a second cam Q3, also secured to the main drivingshaft, engages a second 'pin Q1 on the strip M2, and moves the pin L8 up to the end of the inclined face Z2 of the cam L5, the swivel head Lr1 being turned on its swivel by means of said pin L8, working against said inclined face, to present the needle-point to the mechanism for punching an eye therein, theswivel head ceasing its backward movement during such turning.

I will now describe the eye punching mechanism. The letter R, represents a foundation block or stock upon which lies a lower plate R and an upper plate R2. The stock R and the upper plate R2 are both provided with slots, such as 7', through which pass bolts R3 R3, which also pass through holes in the lower plate R for securing them to each other and to the stock or block R. The slots 'r are elongated, whereby the plates R and R2 and the punching mechanism carried thereby, may be adjusted as occasion may demand, and said plates are 'adjusted by and secured in their position of adjustment by set-screws R4, passing through downwardly extending ianges r thereon, and binding against the stock or block R, and lower plate R. Upon the plate R2 is carried a plunger casing R5, the front face of which is slotted as at R6 (Fig. 5) and provided with a vertical hole, within which works a plunger R7, provided at its lower end with a bore, receiving a punch R0, and communicating with a longitudinal recess R0, in which is pivoted a punch clamp R10. At the upper end, this clamp R10 is formed with a finger-piece R11, which, when pressed toward the plunger, releases the engagement of its lower end with the punch, permitting the removal of said punch, if it should break, or for any other purpose, and its replacement by another punch. Passing through the linger-piece R11, and adapted to bind against the plunger, is a screw R12,which when properly turned, throws the lower end of the clamp R10 into firm engagement with the punching-awl,clampingit securely in place. When turned in the opposite direction, it permits the finger-piece to be operated to release the clamp on said punching-awl. The clamp R10 extends beyond the surface of the plunger, and enters the longitudinal slot R0 in the plunger-casing R5, thus preventing the plunger from rotating or turning in its guide, and guiding it in its reciprocating movements. A cross-head S, is provided at the upper end of the plunger, against the under surface of which bears one end of a strong spiral spring S', which rests in a seat provided therefor in the plunger-casing. This spring acts to raise the plunger and punchingawl after the eye has been punched in the needle. Im mediately below the plunger and in the path of the punching-awl, is arranged a die S2, seated ina block S3, secured to the adjustable plate R2. This die is provided with a groove S4, adapted to receive the needle lengthwise as it is presented by the chuck M2, and is also provided with a vertical hole s, into which the punching awl enters after it passes through the needle to form the eye therein. At the front end ot' the block S3 in front of the die S2, is secured a guide or stop S5, whose operating edge lies directly in line with the groove S1, so that the needle blank is accurately guided into proper position to be acted upon by the punching-awl. In rear of the plungercasing an upright S0 is secured to the plate R2, and near the lower portion thereof is fulcrumed a lever S2, in an adjustable boxing S8, carried in a seat in the upright S0, and controlled by a set-screw S0. The front end of this lever S7 is perforated as at S10 (Fig. Ll) the perforation lying in the path of the punching-awl, and said end of the lever operates as a holder or presser to press upon and firmly hold the needle in position, while the punching-awl is punching an eye therein. The rear end of the lever S7 is extended into an arm IOO which rests upon the free end of an arm S11, pivoted to a standard S12, secured to the baseplate A, and said free end is provided with a cam projection S13, which works upon a cam S11, of a wheel or disk S15, mounted upon the main driving-shaft D. Pivoted to the standard or upright S6, near the upper end, is alever T, whose forward end bears upon the head of the plunger R7, and at its rear end it is loosely connected by a rod Ta with the free end of an arm T', said rod being stepped into a suitable recess in the latter, and said arm being similar to arm S11, and pivotally connected to the standard S12. Upon the periphery of the wheel or disk S15, at one side and slightly in rear of the cam S11, is formed a cam T2, which engages a projection t on the pivoted arni T. At the moment the needle is presented in the groove S4 of the die S2, the cam S11 raises the free end of the arm S11, and with it the rear end of the lever S1, depressing the front or holdingend of said lever, at which time the cam T2 elevates the rear end of the lever T, through the medium of the pivoted arm T', thus depressing the front end of said lever, and throwing down the plunger and its attached punching-awl to pierce the eye of the needle, after which the awl is raised by the spring S,'and the presser-lever is raised by reason of its overbalancing weight in rear of its fulcrum. It will be observed that the parallel disposition of the punching awl and the oppositely disposed co-operating groove cutters enables the grooves and the eye to be accurately cut and punched in two positions, and this is assisted by the swivel head or turret which bears a non-rotatable or substantially fixed chuck, and whereby the rotation of the needle is entirelyr avoided. At this time the pin Q on the reciprocating strip M8 is again engaged by the periphery of the cam Q, and the sliding support and the needle-carrier continue their backward movement, until the rear end ot' the rod M1in the tube M2, comes in contact with the abutment M6, when the spring jaws M5 separate and the needle can be readily removed. The operation can now be repeated upon another needle-blank.

I am aware that a machine for automatically performing both the operation of grooving and that of punching the eye in needle blanks is not broadly new and I do not therefore lay claim thereto.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a machine for grooving and punching needle -blanks, the combination with two groove-cutters located opposite eacli other, of punching mechanism includingfa punch located in the same plane as the cutters, and means including an oscillating head and a non-rotatable chuck, for automatically transferring the grooved needle blanks from the said groove cutters to the punch of the punching mechanism, substantially as described,

and whereby the operations of grooving and punching the needles are accomplished at two points, and without rotating the needles.

2. In a'machine'for grooving and punching needle blanks, the combination with teedlng mechanism, of two groove-cutters located opposite each other, punching mechanismincluding a punch located in the same plane as the said groove-cutters, anon-rotatable chuck for transferring the needles from the groovecutters to the punch of the punching mechanism, an oscillating head on which the said chuck is mounted, and a reciprocating carrier for the said head, substantially as described, and whereby the operations of grooving and punching the needles are accomplished at two points and without rotating the needles.

3. In a machine for grooving and punching needle-blanks, the combination with grooving cutters and punching mechanism, of a needlecarrier secured to a swivel-head, and a rec1p rocating slide on which said head is swiveled, substantially as described.

4. In a machinefor grooving and punching needle-blanks, the combination with grooying cutters and punching mechanism, a reciprocating swivel head, a needle-carrier secured to said swivel head, and a cam lying in the path of said swivel head for turning the same to present a needle to the punching mechanism after it has been grooved by the grooving cutters, substantially as described.

5. In a machine for grooving and punching needle-blanks, the combination Withgrooving cutters and punching meclianism,of a reciprocating swivel head, a needle-carrier secured thereto, a cam lying in the path of said swivel head, and a pin connected with said swivel head to engage said cam and turn the swiyel head to transfer a needle to the punching mechanism after it has been grooved, substantially as described.

6. In a machine for grooving and punching needle-blanks, the combination with grooving cutters and punching mechanism, of areciprocating swivel-head, needle-carrying mechanism secured thereto, a sliding plate carrying a cani lying in the path of said swivelhead, and a pin secured to said swivel head to engage said cam, substantiallyas described.

7. In a machine for grooving and punching needle-blanks, the combination with grooving `cutters and punching mechanism, of needle feeding devices, a reciprocating swivel head, a needle carrier secured to said head, means for moving said head and carrier forward to present a needle to the grooving cutters, a cam lying in the path of said swivel head, and a pin secured to said swivel head to engage said cam and turn the swivel head to transfer a needle to the punching mechanism after it has been grooved, and meansfor retiring said head to bring the carrier into position to receive another needle from the needle-feeding devices, substantially as described.

S. In a machine for grooving and punching IOO IIO

ISO

needle-blanks, a feeding device comprising a hopper having a slotted bottom, n carrier belt running in said slotted bottom, and a. removable follower for said hopper, constructed with a corrugated lower edge, substantially as described.

9. In a. machine for grooving and punching needle-blanks, a feeding device comprising a hopper having a slotted bottom, a removable zo follower for seid hopper, constructed with e corrugated lower edge, and means for vibrating the said removable follower, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscrib I5 ing witnesses.

IRA T. SMITH. Witnesses:

FRED C. EARLE, J. II. SHUMwAY. 

